from my experience with red oak board bows it really depends on the board you start with and then how carefully you tiller it. also i think design factors into the equation. the bow i built with the most string follow is my shortest bow, being 60",50#@27". the bow with least set is my longbow, which is 72", 49#@28". the shorter bow took 1 3/4" of string follow, whereas the longbow only took about 1". the short bow also developed a crack i had to patch halfway through tillering, so im guessing that the grain/ wood on that board was probably not very good. i dont know much about reflexing board bows, as i havent tried it and have no idea if red oak would respond well. excercise the limbs after removing wood, and never pull more than your intended draw weight and length, especially not early on in tillering.